#' @md
#' 
#' @section Keras Backend:
#' 
#' This function is part of a set of Keras backend functions that enable
#' lower level access to the core operations of the backend tensor engine 
#' (e.g. TensorFlow, CNTK, Theano, etc.). 
#' 
#' You can see a list of all available backend functions here:
#' <https://keras.rstudio.com/articles/backend.html#backend-functions>.
#' 
